Abstract
In this study, a nanostructured cobalt oxide/nitrogen doped multiwall carbon nanotube (N-MWCNT/Co3O4) composite was synthesized by thermal decomposition process in the presence of aqueous ammonia and urea. Transmission electron microscopy (TEM) confirmed that the nanostructured Co3O4 nanoparticles were densely decorated over the N-MWCNT surface. The supercapacitive properties of the composite electrode were studied in aqueous potassium hydroxide (KOH). The composite showed high specific capacitance (406Fg−1 at a current density of 2Ag−1) and excellent cycle stability (93% capacitance retention after 10,000 cycles), demonstrating its potential application in high-performance supercapacitors.
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